Earthquake (quarry blast) with magnitude of ML 1.4 on date 21-12-2020 and time 13:58:53 (UTC) in region 10 km S San Giovanni Rotondo (FG)

A magnitude ML 1.4 (quarry blast) earthquake occured in region: 10 km S San Giovanni Rotondo (FG), on

  • 21-12-2020 13:58:53 (UTC)
  • 21-12-2020 14:58:53 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.623, 15.701 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Event type: quarry blast.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
San Giovanni Rotondo FG 10 27184 27184
Rignano Garganico FG 11 2117 29301
San Marco in Lamis FG 11 13831 43132
Manfredonia FG 18 57279 100411

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km W of Manfredonia (57279 inhabitants)
22 Km NE of Foggia (151991 inhabitants)
27 Km E of San Severo (53905 inhabitants)
43 Km NW of Cerignola (58396 inhabitants)
59 Km NW of Barletta (94814 inhabitants)
66 Km NW of Andria (100440 inhabitants)
71 Km NW of Trani (56217 inhabitants)
79 Km NW of Bisceglie (55422 inhabitants)
88 Km NW of Molfetta (59874 inhabitants)
94 Km NE of Benevento (60091 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 1.4 2020-12-21
13:58:53
41.6233 15.7007 1 2021-02-26
14:56:14
Bollettino Sismico Italiano INGV 86124431
Reviewed
Rev100
ML 1.7 2020-12-21
13:58:52
41.5923 15.7035 9 2020-12-21
14:10:39
Sala Sismica INGV-Roma 85603011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-21 13:58:53 ± 0.13
Latitude 41.6233 ± 0.0090
Longitude 15.7007 ± 0.0060
Depth (km) 1 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type quarry blast
Origin ID 86124431

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1070
Semi-minor axis of confidence ellipse (meter) 430
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 16
Circular confidence region, given by single value of horizontal uncertainty (meter) 1070
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 198
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.17897
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 9
Type of magnitude ML
Reference to an origin 86124431
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-27 19:50:01

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 85603011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-21 14:10:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ISPIC.HNZ. 2020-12-21T14:00:33.72 3.0 undecidable manual Sn -9.99 0
IV.EUCT.HNZ. 2020-12-21T14:00:24.40 3.0 positive manual Pn 7.53 0
IV.MILN.HNZ. 2020-12-21T14:00:19.28 3.0 undecidable manual Pn 0.97 0
IV.NDIM.HHZ. 2020-12-21T14:00:07.16 3.0 positive manual Pn 6.62 0
NI.VINO.HHZ. 2020-12-21T14:00:01.37 3.0 undecidable manual Pn -0.32 0
IV.MMO1.EHZ. 2020-12-21T13:59:56.08 3.0 undecidable manual Sn -0.95 0
IV.LRP.EHZ. 2020-12-21T13:59:36.49 3.0 undecidable manual Sn -4.36 0
IV.VAGA.HHZ. 2020-12-21T13:59:29.37 3.0 undecidable manual Sg 0.95 0
IV.RNI2.HHZ. 2020-12-21T13:59:28.91 3.0 undecidable manual Sg -2 0
IV.PIPA.HHZ. 2020-12-21T13:59:15.11 3.0 negative manual Pg 1.58 0
IV.VVLD.HHZ. 2020-12-21T13:59:13.21 3.0 negative manual Pn -2.63 0
IV.MRVN.HHZ. 2020-12-21T13:59:07.16 3.0 undecidable manual P 0
OT.TAR1.HHZ. 2020-12-21T13:59:02.91 3.0 positive manual P -0.13 0
IV.MSAG.HHZ. 2020-12-21T13:58:57.15 0.3 undecidable manual P 60 0.179 91 -0.14 71
IV.APRC.HHZ. 2020-12-21T13:58:57.00 0.1 undecidable manual P 319 0.1781 91 -0.26 93
IV.SGRT.HHZ. 2020-12-21T13:58:56.34 0.1 undecidable manual P 14 0.1349 92 0.04 98
OT.OT04.EHE. 2020-12-21T13:58:56.18 0.3 undecidable manual P 317 0.1313 92 -0.04 74
OT.OT05.EHZ. 2020-12-21T13:58:55.10 0.1 undecidable manual P 296 0.0818 93 -0.01 100
OT.OT06.EHE. 2020-12-21T13:58:55.68 0.1 undecidable manual P 308 0.1007 93 0.14 97
OT.OT03.EHE. 2020-12-21T13:58:55.64 0.1 undecidable manual P 337 0.0962 93 0.19 96
OT.OT07.EHE. 2020-12-21T13:58:53.69 0.1 undecidable manual P 98 0.0144 108 0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
OT.OT05.EHE. ML:0 0.001175 0.38 AML other m 2020-12-21T13:58:59.47
OT.OT05.EHN. ML:0 0.001007 0.42 AML other m 2020-12-21T13:58:59.73
IV.SGRT.HHE. ML:1.3 0.0002615 0.2 AML other m 2020-12-21T13:59:00.18
IV.SGRT.HHN. ML:1.4 0.0003115 0.16 AML other m 2020-12-21T13:59:00.32
IV.MSAG.HHE. ML:1.1 0.00010281865 0.3392 AML other m 2020-12-21T13:59:01.63
IV.MSAG.HNE. ML:1.5 0.0002501196 0.3392 AML other m 2020-12-21T13:59:01.63
IV.APRC.HHE. ML:1.4 0.0002050748 0.2816 AML other m 2020-12-21T13:59:04.27
IV.APRC.HNE. ML:1.4 0.00022962125 0.7808 AML other m 2020-12-21T13:59:04.85
IV.MSAG.HNN. ML:1.8 0.000577 0.38 AML other m 2020-12-21T13:59:05.42
IV.MSAG.HHN. ML:1.4 0.000242 0.38 AML other m 2020-12-21T13:59:05.42
IV.APRC.HHN. ML:1.6 0.00031 0.54 AML other m 2020-12-21T13:59:06.21
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download